A:AnswerYou can use the stock microphone but you have to buy an adapter specific to your car.
(Universal steering wheel adapter, if controls are built into your steering wheel)
A:AnswerI asked someone at the store to look it up for me before I bought my stereo. Also, if you schedule an installation, I think they tell you what you need, and they get it before you go in for the install.
A:AnswerPlease check for the code under the center console cover or near the fuse box area or the sticker on the back page of the car manual depending on the make model of the car.